ATtiny43U Atmel Corporation, ATtiny43U Datasheet - Page 4

• Manufacturer Part Number: ATtiny43U
• Manufacturer: Atmel Corporation

Specifications of ATtiny43U

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 8 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 16
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 64
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 0.7 to 5.5
• Operating Voltage (vcc): 0.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

2. Overview
4
ATtiny43U
The ATtiny43U is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC
architecture. By executing powerful instructions in a single clock cycle, the ATtiny43U achieves
throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power con-
sumption versus processing speed.
Figure 2-1.
The AVR core combines a rich instruction set with 32 general purpose working registers. All the
32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent
registers to be accessed in one single instruction executed in one clock cycle. The resulting
VBAT
GND
LSW
PROGRAMMING
CONVERTER
INSTRUCTION
INSTRUCTION
DATA REGISTER
INTERFACE
PROGRAM
REGISTER
DECODER
CONTROL
Block Diagram
ON-CHIP
BOOST
DEBUG
LOGIC
FLASH
LINES
PORT A
ISP
DRIVERS
PORT A
PA7:0
V
CC
DIRECTION REG.
SUPERVISION
REGISTERS
PORT A
PROGRAM
REGISTER
COUNTER
PURPOSE
GENERAL
POINTER
POWER
STATUS
STACK
SRAM
RESET
RESET
ALU
POR
BOD
X
Y
Z
DATA REGISTER
MCU CONTROL
MCU STATUS
OSCILLATOR
WATCHDOG
INTERRUPT
COUNTER0
COUNTER1
REGISTER
REGISTER
INTERNAL
PORT B
EEPROM
TIMER/
TIMER/
TIMER
UNIT
USI
DRIVERS
PORT B
PB7:0
DIRECTION REG.
COMPARATOR
CALIBRATED
OSCILLATOR
REFERENCE
TIMING AND
PORT B
CONTROL
VOLTAGE
ANALOG
ADC
8048B–AVR–03/09